Cranberries contain a massive amount of natural pectins. They will gel all on their own, which is why you can basically make cranberry sauce out of filling.
Alton BrownJeff Smith was the Julia Child of my generation. When his television show, 'The Frugal Gourmet,' made its debut on PBS in the 1980s, it conveyed such genuine enthusiasm for cooking that I was moved for the first time to slap down cold cash for a collection of recipes.
Alton BrownSo on one hand, honey is an amazingly sophisticated and efficient food source. On the other hand, it's bee backwash.
Alton Brown